Why do nearsighted people need a prescription and a $300 pair of glasses, while farsighted people can buy their glasses at the dollar store? |
- Why do nearsighted people need a prescription and a $300 pair of glasses, while farsighted people can buy their glasses at the dollar store?
- How does a new mole start and develop?
- When a nutrition label says '100mg sodium' does that equate to 100mg or ~300mg of table salt (Sodium chloride)?
- How are medications manufactured to such precise levels?
- Does there exist a perfect, fundamental system of units for mass, time, length, etc. that would eliminate the need for constants?
- When dropping a nuclear or hydrogen bomb, does height matter? Does a longer drop cause a bigger explosion?
- Why are the noble gases gases and not some other state of matter?
- Are there "quark orbitals" in the nucleons analogous to electron orbitals in the atom?
- How can the rock/mineral distributions seem so stark in the same mountain ranges?
- Is it possible for vaccines to spread like normal colds/flu? (Through coughing or sneezing)
- Does glyphosate cause cancer?
- Is race really relevant for a medical diagnosis?
- Would a bridge made of ice get stronger as it got colder?
- Are removing CH4 and CO2 the only ways to combat global warming?
| Posted: 10 Sep 2019 05:12 AM PDT |
| How does a new mole start and develop? Posted: 09 Sep 2019 06:54 PM PDT Does a new mole start out as a baby(meaning small bump/freckle like) then become bigger until it stops at its grown size? Or does it show up one day fully grown? [link] [comments]  |
| Posted: 09 Sep 2019 10:59 PM PDT This is more asking what the label means by "sodium". If they do only measure the sodium amount, why is that? Do we care more about the amount of sodium ions than the total amount of salt substances? [link] [comments]  |
| How are medications manufactured to such precise levels? Posted: 10 Sep 2019 02:33 AM PDT When you see medications that include an insanely small amount of something – say 25μ grams – how do drug manufacturers measure and add such a small quantity of that substance to a single pill or dosage of liquid, like a vaccine? [link] [comments]  |
| Posted: 09 Sep 2019 01:17 PM PDT The Universal Gravitational Constant and Plank's Constant only need to exist because our calculations in physics and other fields are all done with (essentially) man-made arbitrary units of measurement that need to be adjusted inside a formula for the formula to work with our units. It would make sense that the universe has its own fundamental units that it "uses" in its calculations and therefore has formulas without stuff like 6.673 X 10-11 in the middle of it. For instance, imagine that the universe has its own units such that F = (m1m2)/d2 without the need for the G that we use; the units would be foundational to what the universe considers "1 mass" or "1 time". This system of measurements could shed light on some of our fundamental questions about how our universe works and why it is the way it is. Does such a system exist? [link] [comments]  |
| Posted: 09 Sep 2019 07:48 AM PDT From my basic understanding of those weapons, it's about a chain reaction that happens at the atomic level. I assume this is triggered by an impact, but it doesn't matter how hard the impact is. In other words: I assume that no matter if the chain reaction is dropped from the sky or started in a building, the explosion would be the same. Is that correct? [link] [comments]  |
| Why are the noble gases gases and not some other state of matter? Posted: 09 Sep 2019 08:31 PM PDT I understand that the noble gases are unreactive because they have full valence shells. I was wondering why elements with a full valence shell tend to be a gas rather than a liquid or solid when in their pure state. Or for that matter, why the elements tend to move from solids to gases as you move from left to right across the periodic table. [link] [comments]  |
| Are there "quark orbitals" in the nucleons analogous to electron orbitals in the atom? Posted: 09 Sep 2019 04:13 PM PDT So the main change in the quantum mechanical model of the atom as opposed to its previous visualizations is that the electrons are no longer depicted as little balls orbiting around the proton and instead as wave functions "trapped" in a spherical enclosure with a limited number of vibrational modes. What confuses me is that every single video I've watched about quarks shows them as little marbles wiggling around. Shouldn't the same logic of confined particles being standing waves also apply to quarks? [link] [comments]  |
| How can the rock/mineral distributions seem so stark in the same mountain ranges? Posted: 09 Sep 2019 08:19 PM PDT I could be totally off on this observation. But I am a rock climber from Salt Lake City and we have two main canyons near the city for outdoor climbing - Big Cottonwood Canyon and Little Cottonwood Canyon. The climbing in Big Cottonwood Canyon is almost exclusively on quartzite. There may be other rocks to climb on there, but I have never climbed on anything other than quartizite in that canyon. However, Little Cottonwood Canyon is about a ten minute drive from Big Cottonwood, yet it is almost exclusively granite. They're close enough that if I wanted to, I could walk over the mountains on the north side of Big Cottonwood and end up on the south side of Little Cottonwood. Yet the difference in rock composition seems so evenly distributed, with quartzite kept in Big Cottonwood and granite kept in Little Cottonwood. How is that distribution so stark and noticeable when they are so close to each other and part of the same mountain range? To add even further, I could drive 45 minutes west of these mountains and climb on completely limestone mountains in the Stansbury Mountains. It just seems odd to me that each rock seems to conglomerate into a specific canyon when the canyons are so close to each other. Hopefully this isn't a stupid question, but I was thinking about it today. [link] [comments]  |
| Is it possible for vaccines to spread like normal colds/flu? (Through coughing or sneezing) Posted: 09 Sep 2019 10:35 AM PDT |
| Posted: 09 Sep 2019 08:11 AM PDT Not being a professional scientist, it is hard to evaluate the credibility of studies and articles on that subject that seems highly controversial. Wikipedia's conclusion (which generally manages to avoid propaganda) differs depending on which language you read the article in. What is the consensus among profesionnal scientists on the question? [link] [comments]  |
| Is race really relevant for a medical diagnosis? Posted: 09 Sep 2019 05:02 AM PDT On r/AskDocs one of the required infos is "race". I've been wondering which illnesses have anything to do with race. It would make more sense to me to ask for the country that the person lives in, because then they would actually know what diseases are more widespread there etc. So is there anything I am overlooking? I really don't understand why it's supposed to be relevant info. [link] [comments]  |
| Would a bridge made of ice get stronger as it got colder? Posted: 09 Sep 2019 03:51 AM PDT Does the solidifying of ice strengthen as it continues to cool, does it become more brittle or is there a plateau where it can't get stronger? [link] [comments]  |
| Are removing CH4 and CO2 the only ways to combat global warming? Posted: 09 Sep 2019 04:59 AM PDT Are there any other gases we can realistically work on? Removing water from the atmosphere can only be done by modifying the temperature, right? Adding a salt to the ocean to make it evaporate less isn't really realistic. Are there any thoughts on making more of the earth reflective, or adding particles to the atmosphere that are somewhat possible and worth considering, or are we stuck with reducing those two gasses? [link] [comments]  |
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